1/16 a^{a0,a3}_{a1,a2} b^{c0,a4}_{v0,v1} c^{v2,v3}_{c1,c2} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(c2) a+(v0) a+(v1) a-(v3) a-(v2) a-(a0) a-(c0)